A script to use with neomutt to save a list of tagged emails.

save_emails.sh

#!/bin/bash

# This script is used to save a list of emails from neomutt's pipe. Be sure to
# set pipe_split in neomutt.
#
# Pass the directory name as the first argument. The email content is expected
# to be in stdin.
#
# The second argument is optional. It can be used to force the patch version to
# be something else. For example, pass v3 as the second argument. Even if the
# patch subject has v2 in it, it will be saved as v3. I use this when some
# people don't properly version their patches, and I want to avoid manually
# renaming the files.

# Create the target directory if it doesn't already exist.
mkdir -p "$1"

if test $? -ne 0; then
	exit 1
fi

message=$(< /dev/stdin)

# Figure out a name for the file. The following logic is a bit flaky. Might
# mess up somewhere.

subject=$(echo "$message" | grep '^Subject:' | head -n 1 | sed 's/Subject: //')

if test -z subject; then
	echo "Error! No subject line found"
	exit 1
fi

# Remove all blocks wrapped in square brackets. Then remove all initial
# whitespace.
stripped_subject=$(echo "$subject" | sed 's/\[.*\]//g' | sed 's/^[[:space:]]*//')

file_ext=".mbox"

is_patch=$(echo "$subject" | grep '\[.*PATCH.*\]' | wc -l)

if test $is_patch -gt 0; then
	patch_num=$(echo "$subject" | grep -o '\[.*PATCH.*\]' | grep -oE '[0-9]+/[0-9]+' | cut -d '/' -f 1)

	# If no patch number was found, set it to 1.
	if test -z $patch_num; then
		patch_num=1
	fi

	# Make it a 4-digit number, just like the output from git-format-patch.
	patch_num=$(printf "%04d" "$patch_num")

	patch_version=$(echo "$subject" | grep -o '\[.*PATCH.*\]' | grep -oE 'v[0-9]+')

	if test -z $patch_version; then
		patch_version="v1"
	fi

	# If the second argument is supplied, over-ride the patch version.
	if test -n "$2"; then
		patch_version="$2"
	fi

	file_ext=".patch"
	filename="$patch_version-$patch_num-"
fi

# Convert all non-alpha characters to '-', and remove consecutive dashes.
filename="$filename$(echo "$stripped_subject" | sed 's/[^[[:alpha:]]/-/g' | sed 's/---*/-/g')"

# Strip the filename to 60 characters.
filename=$(echo "$filename" | cut -b -60)

# Add the directory and extension.
filename="$1/$filename$file_ext"

# Make sure the file does not already exist.
if test -e "$filename"; then
	echo "Error! $filename already exists"
	exit 1
fi

echo "$message" > $filename